Classifications

• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
  • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
  • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
  • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
  • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
  • G09G3/3607—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
• • G—PHYSICS
  • G02—OPTICS
  • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
  • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
  • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
  • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
  • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
  • G02F1/1333—Constructional arrangements; Manufacturing methods
  • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
  • G02F1/133509—Filters, e.g. light shielding masks
  • G02F1/133514—Colour filters
• • G—PHYSICS
  • G02—OPTICS
  • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
  • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
  • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
  • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
  • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
  • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
  • G02F1/1362—Active matrix addressed cells
  • G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
  • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
  • H04N3/12—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by switched stationary formation of lamps, photocells or light relays
  • H04N3/127—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by switched stationary formation of lamps, photocells or light relays using liquid crystals

Definitions

• the present invention relates to a liquid crystal display device for receiving television images, for example.
• (1) is an input terminal to which a television video symbol is supplied, and the symbol from the input terminal (1) is, for example, a ⁇ channel.
• Lm in the vertical (Y-axis) direction are supplied through switching elements Mi, M2 *. ⁇ Mm composed of FETs.
• m is a number corresponding to the number of pixels in the horizontal (X-axis) direction.
• the cis-Doo register (2) in the m times the horizontal frequency click lock ⁇ word No. ⁇ 1 ⁇ , ⁇ 2 ⁇ is supplied, the shift register (2) ⁇ ⁇ Htn is a driving pulse signal that is sequentially scanned by the clocks ⁇ 1 ⁇ and ⁇ 2 ⁇ from the output terminals of each of the switching elements Mi to Mm. Supplied to the child.
• the low potential (V ss ) and the high potential (V DD ) are supplied to the shift register ( 2 ), and a drive pulse of these two potentials is formed.
• each line L i ⁇ L m to Sui switching element M consisting respectively, for example N channel FET, ⁇ ⁇ 2 ⁇ - ⁇ ⁇ M m ⁇ ⁇ 12 ⁇ M 22 ⁇ • ⁇ M n2 ⁇ ⁇ - im, M 2in - ⁇ 'One end of M nm is connected.
• n is a number corresponding to the number of horizontal scanning lines.
• N stages of shift register (4) is provided is found, click lock signal [Phi Iotanyu the horizontal frequency to the shift register (4), [Phi 2v is supplied, the sheet Oice register (4) click lock signal [Phi 1V from the output terminals of the drive pulse signal by connexion scanned sequentially ⁇ 2V 0 Vi, V2 - ⁇ ⁇ 0 ⁇ 1 is horizontal (X-axis) direction the gate line Gi, each column of the X-axis direction of the emission quenching element M u ⁇ Mnm 'sweep rate through G n' G 2 ⁇ ⁇ ( M u ⁇ M ira), (M 21 ⁇ M 2m) ⁇ ⁇ ⁇ (Mr ⁇ M nm ). Note that V ss and V DD are supplied to the shift register) in the same manner as the shift register ( 2 ).
• a current path of Cu (target terminal) is formed, and a potential difference between the signal supplied to the input terminal ⁇ and the target terminal (S) is supplied to the liquid crystal cell C. Therefore, a charge corresponding to the potential difference due to the signal of the first pixel is sampled and held in the capacity of the cell Cii.
• the light transmittance of the liquid crystal is changed in accordance with the charge amount. The same operation is sequentially performed on the cells C12 to Cnm , and the charge amount of each of the cells C1 to Cnm is rewritten when the signal of the next field is supplied.
• the light transmittance of the liquid crystal cells Cu to C nm is changed corresponding to each pixel of the video signal, and this is sequentially repeated to display a television image.
• an AC drive is generally used to improve its reliability and life.
• a video signal is inverted for each field or every frame and supplied to the input terminal (1). That is, the input terminal (1) is supplied with an inverted signal for each field or frame as shown in FIG. 12E. ,
• the pixel electrodes P of the respective liquid crystal cells C have conventionally been arranged in the vertical and horizontal directions as indicated by broken lines in the figure.
• two so-called interlaced screens are displayed on the same display unit in order to reduce the size of the image path. For this reason, the conventional apparatus has a problem that the vertical resolution is reduced.
• Fig. 13A black is displayed on the nth scan line in the first field of the interlace and the ⁇ + 264 scan line in the second field. If other images are white, and they are displayed on the same display unit, white and white are displayed alternately on the two adjacent display units as shown in FIG.
• the squares shown in the figure indicate one liquid crystal cell, and the upper characters in them indicate black ( ⁇ ) and white (W) display in the first field, and the second field in the lower. It shows the display in the root.
• the display is a single line with twice the gray width as a whole, and the vertical resolution is reduced. Was gone.
• a color filter of a different color is arranged for each liquid crystal cell C, and the video signal supplied to the input terminal (1) is represented by a corresponding color symbol, thereby displaying the image. It can be colored.
• the pixel electrodes ⁇ of each liquid crystal cell C were conventionally arranged in the vertical and horizontal directions as indicated by broken lines in the figure.
• R indicates a red color filter
• G indicates a green color filter
• B indicates a blue color filter.
• the resolution in the horizontal direction is 1 to 3 as compared with a single color, and the image quality is extremely deteriorated.
• a so-called mosaic type color filter as shown in Fig. 15 has been proposed.
• the horizontal resolution is improved compared to the strip type, but as is clear from the figure, the color filters of the same color are arranged diagonally, so that the screen may have a beam interference. Oblique color streaks appeared, which caused the image quality to deteriorate significantly.
• the present invention has been made in view of the above-described problems. According to this apparatus, by providing a shift of one pixel pitch and two pixel pitches, the vertical resolution is increased and the image quality is improved. be able to.
• FIG. 1 is a configuration diagram of a liquid crystal display device according to the present invention
• FIGS. 2 to 4 are diagrams for explaining the operation thereof
• FIGS. 5 to 7 are diagrams each showing a specific configuration of an element
• FIG. FIG. 8 is a block diagram for color display
• FIGS. 9 and 10 are diagrams for explaining the same
• FIGS. 11 to 15 are diagrams for explaining a conventional technique.
• switching elements M u, M 12,..., M nm are provided in every other direction, and the pixel electrodes P U, P 12,.
• the video signal from the input terminal (1) is supplied to the delay circuit (11) for one horizontal period, and the symbol from the delay circuit (11) is changed to one fixed contact of the switching switch (12). And supply the original video signal from the input terminal (1) to the other fixed contact B of the switching switch (12). This The signal from the switching switch (12) is supplied to the switching elements M i to M m.
• the horizontal scanning lines constituting the image are sequentially displayed on one field by the pixel electrodes connected to the same gate line, for example, as shown by a solid line in FIG. You.
• the switch (12) is switched every clock period, and the pixel electrode shifted upward with respect to the gate line has a delay circuit (11). Supplies a signal delayed by one horizontal period.
• the signals constituting the same horizontal scanning line are displayed on the next horizontal scanning line every other pixel electrode. Therefore, in the other field, the horizontal scanning line is displayed on the lower pixel electrode every other pixel electrode, and is displayed as shown by the broken line in the figure.
• the apparent scanning line is at the average position of these, so that the scanning line of the other field is separated as shown in FIG. 3 and the vertical resolution is improved.
• the scanning lines n — 1, ⁇ , n + 1, ⁇ + 2 of one field are displayed as shown by solid lines, and the scanning lines of the other field are displayed.
• ⁇ + 262, ⁇ + 263, ⁇ + 264, ⁇ + 265 are displayed as indicated by broken lines, and the display is as shown in FIG.
• a pixel electrode indicated by a double line between the displayed ⁇ ( ⁇ ) lines displays white (W) together with the other fine electrode, and a white display between the black lines.
• the black line is separated into two lines, and the vertical resolution is increased.
• the image is displayed in this manner.
• the vertical resolution could be increased compared to the conventional device.
• FIG. 5 shows a specific arrangement of the elements.
• the extension of the line L is connected to one end of a switching element M shown by diagonal lines, and the other end of the element M is connected to the other end.
• the pixel electrode P Connected to the pixel electrode P
• FIGS. 6 and 7 show other examples of specific element arrangements. These examples are both Sui switching element M ii, M i2 - ⁇ ⁇ M configuration of mn is equal, each pixel electrode P, P 12 - ⁇ * P nm as the pixel electrode PP in devising the connection 12 ⁇ ⁇ ⁇ P nm position
• FIG. 8 shows a case of performing color display.
• red (R), green (G), and blue (B) color filters are arranged as shown in the figure.
• the respective color signals are supplied from the input terminals (IB) (1G) (1B), and these are selected by the switches (13R), (13G), and (13B), and the delay 11 (11) and the switching are performed. It is supplied to the switch (12).
• the switch (13R) is connected to the alternate pixel electrode. (13B) are turned on alternately, and the switch (13G) is turned on while the next gate line Gt + ⁇ is selected.
• the structure of the color filter is as shown in Fig. 10. According to this, the horizontal resolution is improved to half that of the case of single color, and oblique color streaks are generated. Because there is no image quality, extremely good image quality can be obtained.
• the display position is switched by using a delay circuit for the horizontal period, but this is achieved, for example, by switching the switching elements Mu to Mmn of the pixel electrodes shifted by a half pixel pitch.
• the display position can be switched by connecting them to different gate lines G i to G n, respectively.
• every other pixel in the horizontal direction is shifted by 1/2 pixel pitch in the vertical direction.This is because every other pixel in the vertical direction is shifted by 1/2 pixel pitch in the horizontal direction.
• a similar improvement in image quality can be achieved.
• the vertical resolution can be increased, and the image quality can be improved.

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• Physics & Mathematics (AREA)
• Chemical & Material Sciences (AREA)
• Crystallography & Structural Chemistry (AREA)
• Nonlinear Science (AREA)
• Engineering & Computer Science (AREA)
• General Physics & Mathematics (AREA)
• Mathematical Physics (AREA)
• Optics & Photonics (AREA)
• Multimedia (AREA)
• Signal Processing (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Computer Hardware Design (AREA)
• Theoretical Computer Science (AREA)
• Liquid Crystal Display Device Control (AREA)
• Transforming Electric Information Into Light Information (AREA)
• Video Image Reproduction Devices For Color Tv Systems (AREA)

Priority Applications (1)

Applications Claiming Priority (4)

Publications (1)

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ID=26496886

Family Applications (1)

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Cited By (2)

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Citations (4)

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• 1985
  • 1985-08-22 DE DE8585904149T patent/DE3582492D1/de not_active Expired - Lifetime
  • 1985-08-22 WO PCT/JP1985/000463 patent/WO1986001624A1/ja active IP Right Grant
  • 1985-08-22 EP EP85904149A patent/EP0194315B1/de not_active Expired - Lifetime
  • 1985-08-22 US US06/859,626 patent/US4745406A/en not_active Expired - Lifetime

Patent Citations (4)

Non-Patent Citations (1)

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